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<title>Problem 1215. -- [HNOI2003]24点游戏 -- 衡阳八中OJ离线版-2012-02-29</title><center><h2>1215: [HNOI2003]24点游戏</h2><span class=green>Time Limit: </span>10 Sec&nbsp;&nbsp;<span class=green>Memory Limit: </span>162 MB<br><span class=green>Submit: </span>20&nbsp;&nbsp;<span class=green>Solved: </span>3<br>[<a href='submitpage.php?id=1215'>Submit</a>][<a href='problemstatus.php?id=1215'>Status</a>][<a href='bbs.php?id=1215'>Discuss</a>]</center><h2>Description</h2><div class=content>为了培养小孩的计算能力，大人们经常给小孩玩这样的游戏：从1付扑克牌中任意抽出4张扑克，要小孩用“+”、“-”、“×”、“÷”和括号组成一个合法的表达式，并使表达式的值为24点。这种游戏就是所谓的“24点游戏”。
请你编程求出对于给出的任意4个正整数a、b、c、d，请你编程求出这4个整数能组成多少个值为24的不同表达式。
</div><h2>Input</h2><div class=content>输入共一行，为4个正整数a、b、c、d
（0<=a,b,c,d<=100）
</div><h2>Output</h2><div class=content> 输出由a、b、c、d组成的值为24表达式个数，如没有，输出0。</div><h2>Sample Input</h2>
			<div class=content><span class=sampledata>5 5 5 5</span></div><h2>Sample Output</h2>
			<div class=content><span class=sampledata>1</span></div><h2>HINT</h2>
			<div class=content><p></p></div><h2>Source</h2>
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